Yokogawa MLD Specifications

Yokogawa Corporation of America

2 Dart Road, Newnan, GA 30265

770-254-0400

GS 61A01A-01E-A

March 2018

4th Edition

General
Specifications

GS 61A01A01-01E-A

Model MLD

Loop Powered Process Indicator

Model

Suffix Codes

Description

MLD Field Mounted Loop Indicator (Digital)

Input Signal

-A
4 to 20 mA DC

Mounting

1
2

2” Horizontal Pipe
2” Vertical Pipe (or wall mount)

Housing

/1

/2

Cast Aluminum Alloy - (Standard Housing)

SUS316 Cast Stainless Steel and ASTM CF-8M

Electrical
Connection

/00

/20

/30

/40

ANSI ½ NPT female, without blind plug

ANSI ½ NPT female, 316 Stainless Steel blind plug

ISO M20 female, without blind plug

ISO M20 female, 316 Stainless Steel blind plug

Ex Protection

/FF1
/CF1

FM Explosion Proof
CSA Explosion Proof

Optional Specifications

Coating

/X1

/X2

Epoxy resin coating

Polyurethane-Epoxy Anti-corrosion coating

Paint

/P1

/P2

/P3

/P4

/P5

/P6

/P7

Light Blue (RA L # 5012)

Orange (RAL # 2008)

Red (Munsell # 7.5 R4/14)

Mint Green

Silver (RAL # 9006)

Yellow (RAL # 1018)

Gray (RAL # 7046)

Calibration

/ENG

Engineering Unit Calibration (MLD Only)

Stainless Steel Tag

/SST

Stainless Steel tag screw attached to housing

Stainless Steel Tag

/SSW

Stainless Steel tag wired to housing

The Model MLD field mounted

indicator receives DC voltage or
current signals from electronic
Transmitters and indicates process
measurement values. Standard
models are NEMA4X and Explosion
Proof.

STANDARD SPECIFICATIONS

Voltage Drop:

1.8V typ., 2V max.

Scale:
0-1999 w/decimal

Accuracy:

± 0.05% of full scale (1999) ±1 count

Operating Temperature Range:

-20 to 60°C

Temperature drift: ±0.3 Count/°C

Insulation

terminals and case 100 Mohm at 500 V DC

Dielectric

and case: 1000 VAC for 1 minute.

Mounting:

surface.

Explosion Protection Type:

EXPLOSIONPROOF
A,B,C,D,
GROUPS E,F,G

Case and Cover: Die cast aluminum or 316
Stainless Steel, baked polyurethane paint. Moss
Green (Stainless Steel is unpainted); NEMA 4X

Electrical

M20 x 1.5

Weight: 2.7 lbs

ORDERING INSTRUCTIONS

1. Model and suffix codes.

2. Option codes

Example

Resistance: Between input

Strength: Between input terminals

Nominal 2” (50mm) pipe mount or

DUST-IGNITIONPROOF

CL1, DIV1, GROUPS

Connection: ½ x 14 NPT or

Ordering

FM, CSA,

CLII / III,

Instructions:

MLD-A1/1/00/FF1/ENG/SST Field Mounted Loop Indicator (Digital), 4 to 20 mA DC, 2” Horizontal Pipe, FM Explosion Proof

0-200 InH2O Scale in Engineering Units. Please specify Engineering units when ordering /ENG
FT-201 Specify Tag Number when ordering /SST or /SSW.

GS 61A01A-01E-A Mar ch 2 018

DIMENSIONS

Mounting